However, the Anagalida are currently[when?] considered to be polyphyletic. Genetic studies have shown that the elephant shrews are actually part of a different macro-group of mammals called the Afrotheria, while the position of several extinct families of Anagalida is uncertain. The Zalambdalestidae are almost certainly unrelated to any of these groups; they probably represent more basal Eutherians and might not even be true Eutherians at all.